Button now uses focus shadow from site.variables

RELEASE-NOTES.md

@@ -45,6 +45,7 @@
 
 **Bugs**
 - **All Modules** - Performance logging now delays 500ms instead of 100ms for console logging to ensure all logs are captured in one group
+- **All Modules/Transition** - Transitions no longer use `rotateZ(0deg)` to trigger GPU display of visible state. This causes issues with `transform` creating new stacking context that can disrupt `z-index`.
 - **Card** - Fix card dimmer not appearing in minified release due to use of background shorthand property
 - **Checkbox** - Fix `disabled checkbox` sometimes displaying hand cursor
 - **Checkbox** - Fixes nested `dropdown` inside `checkbox` causing issues
@@ -58,6 +59,7 @@
 - **Label** - Labels inside `header` now vertical align better by accounting for line height offset
 - **Loader** - Fix position of `inline centered loader` to be centered correctly
 - **Message** - Message now uses `@lineHeight` from `site.variables`
+- **Menu** - Menu now has a `min-height` that matches standard item padding
 - **Modal** - `scrollable modal` now correctly adds padding below modal
 - **Modal** - Modal with `detachable: false` inside `ui sidebar`  `pusher` element will now show correctly
 - **Popup** - Fixes issue with `min-width` in firefox exceeding `max-width` causing element to not wrap correctly

src/themes/default/elements/button.variables

@@ -95,8 +95,7 @@
 @focusBackgroundImage: '';
 @focusBoxShadow:
   @borderBoxShadow,
-  0px 0px 1px rgba(81, 167, 232, 0.8) inset,
-  0px 0px 3px 2px rgba(81, 167, 232, 0.8)
+  @defaultFocusBoxShadow
 ;
 @focusColor: @hoveredTextColor;
 @iconFocusOpacity: 0.85;